cotton-seed tree vs groundsel tree

cotton-seed tree and groundsel tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
cotton-seed tree	Yes	No	No	No
groundsel tree	Yes	No	No	No

As nouns, cotton-seed tree and groundsel tree are synonyms defined as:

cotton-seed tree and groundsel tree: a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tufts

Other synonyms of cotton-seed tree include Baccharis halimifolia, consumption weed, groundsel bush.

cotton-seed tree (noun)	groundsel tree (noun)
a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tufts	a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tufts